im.l O [;Cope. 



/ 

 the deutal characters of the Indian species I am indebted to Messrs. Fal- 

 coner and Lydekker : 



Mastodon americanus Cuv., N. America. 



" fborsoni Hays, E. and S. Euroi^e. 



" mirificus Leidy, N. America. 



" /«Zconen Lydd., India. 



" arvernensis C. & J., Europe. 



" sivalensis Falc, India. 



" latidens Clift., India. 



Dibelodon sliepardi Leidy, California, Mexico. 



' ' tropicus Cope, Tropical America. 



" humholdtu Cuv. , South America. 



Tetrdbelodon angustidens Cuv., India, Europe, N. America. 



" andium Cuv., S. America, Mexico. 



" productus Cope, SW. N. America, 



" euhypodon* Cope, N. America. 



" pentelici QsiXii^xY, SE. Europe. 



" perimensis Falc, India. 



" pandionis Falc, India. 



" turicensis^ Schinz, Europe. 



" campester Cope, N. America. 



" longirostris Kaup, Europe. 



The condition of the inferior incisors is unknown in the Mastodon atti- 

 cus Wagner, and 31. serridens Cope, and M. proavus Cope ; and in some of 

 the above species the presence of an enamel band on the superior incisors 

 has not been established. 



I may add that I do not perceive how the so-called genus Stegodon can 

 be distinguished, as at present, by the numberof crests of the intermediate 

 molars, and by the presence of cementum. It will probably be necessary 

 to look for other characters in order to sustain it. 



Dibelodon shepardi Leidy. 



Mastodon shepardi Leidy, Proceedings Academy Philadelphia, 1870, p. 

 98 ; 1872, p. 142. 



Mastodon ohscurus Leidy part. Report U. S. Geol. Survey Terrs. I, p. 

 330, Plate xxi. 



This species was originally proposed on the evidence of a last inferior mo- 

 lar tooth from Contra Costa county, California, and a part of a superior tusk 

 from Stanislaus county in the same State. Dr. Leidy subsequently aban- 

 doned the species. I however revived it in a synoptic table of the species 

 of North American Mastodons in 1884. X 



The fossils of the Museum Nacioual of Mexico, examined by me, included 



* American Naturalist, 1884, p. .525. 



t Von Meyer is my authority for the presence of mandibular tusks in this 

 species, = M. virgaUdcns Meyer. 



+ American Naturalist, 1881. p. 524. 



